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EEE :: Electrical Machine Design

  1. Which of the following methods is most accurate ?

  2. A.

     Equivalent current method

    B.

     Equivalent power method

    C.

     Equivalent torque method

    D.

     Method of average losses


  3. ________ has a lowrelative permeability and is used principally in field frames when cost is of primary importance and extra weight is not objectionable.

  4. A.

     Cast steel

    B.

     Aluminium

    C.

     Soft steel

    D.

     Cast iron


  5. ________ is the common method of applying brushes to the commntator.

  6. A.

     Radial

    B.

     Trailing

    C.

     Reaction

    D.

     All of the above


  7. Yokes with rectangular cross-section are used for

  8. A.

     small capacity transformers

    B.

     medium capacity transformers

    C.

     large capacity transformers

    D.

     any of the above


  9. Which of the following meters are not used on D.C. circuits

  10. A.

     Mercury motor meters

    B.

     Commutator motor meters

    C.

     Induction meters

    D.

     None of the above


  11. Power transformers have rating

  12. A.

     equal to 50 kVA

    B.

     equal to 100 kVA

    C.

     above 200 kVA

    D.

     none of the above


  13. Which of the following is the basic consideration in the design of insulation ?

  14. A.

     Electrical considerations

    B.

     Mechanical considerations

    C.

     Thermal considerations

    D.

     All of the above


  15. For measuring a very high resistance we should use

  16. A.

     Kelvin’s double bridge

    B.

     Wheat stone bridge

    C.

     Meggar

    D.

     None of the above


  17. Commonly used instruments in power system measurement are

  18. A.

     induction

    B.

     moving coil or iron

    C.

     rectifier

    D.

     electrostatic


  19. Is universally used for windings of electrical machines because it is easily workable without any possibility of

  20. A.

     fracture

    B.

     Silver

    C.

     Steel

    D.

     Aluminium

    E.

     Copper